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KSB Forged Carbon Steel Globe Valve Class 800 — A105

A105 forged carbon steel body, API 602 design, bolted bonnet. Socket weld and threaded (NPT) ends. Integral Stellite 6 seats. NPS ¼–2. For small-bore process piping, instrument connections, and drain/vent applications up to 425°C.

Carbon Steel A105Class 800NPS ¼–2 (DN 8–DN 50)

Specifications

ParameterSpecification
SeriesSICCA 800 GLF
Body MaterialA105 (Forged Carbon Steel)
Pressure ClassClass 800
Size RangeNPS ¼–2 (DN 8–DN 50)
Max Temperature425°C (800°F)
Max Pressure136 bar (1975 psi)
Design StandardAPI 602
End ConnectionsSocket Weld (ASME B16.11), Threaded NPT (ASME B1.20.1)
Bonnet DesignBolted bonnet
TrimIntegral ST6 hard-faced seat ring
IBR CertifiedCheck with KSB
✓ Stellite Hard-Faced Seats✓ API 602

Material & Applications

Why Carbon Steel A105: A105 is the standard forged carbon steel grade for small-bore valves, equivalent to A216 WCB in the cast category. It covers general-purpose applications up to 425°C. The forged construction provides higher mechanical integrity than castings in small sizes, where casting quality is harder to control.

Typical applications: Small-bore process piping, instrument root valves, drain and vent connections, sampling points, gauge connections, bypass lines, and compact piping systems in refineries, power plants, and general industrial applications.

Pressure/Temperature Ratings

Permissible operating pressures per ASME B16.34:

RatingPermissible Operating Pressure at Temperature
Class 800-29 to 38°C: 136 bar204°C: 117 bar316°C: 105 bar425°C: 76 bar

Dimensions & Weights

ClassNPSFace-to-Face (mm)Weight (kg)
8001/41251.5
8003/81251.5
8001/21251.5
8003/41422.0
80011803.0
8001-1/22206.5
800228510.5

Weights are approximate. Dimensions for flanged ends where applicable. Contact us for butt weld dimensions.

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Other Globe Valve Materials

Forged SS F304/F316 — Class 800 Forged Carbon Steel — Class 1500/2500/4500 Cast Carbon Steel WCB — Class 150/300/600 All Globe Valves →

Service & Spares

Seat lapping, packing replacement, and genuine KSB spares for globe valves.

Repair Service → Genuine Spares →

Service Area

Pune, Ahmednagar & Beed, Maharashtra.

Carbon Steel A105 Globe Valve FAQs

What is the difference between Class 800 forged and Class 600 cast globe valves?
Class 800 forged valves (API 602) are designed for small-bore piping (NPS ¼–2) with socket weld or threaded ends. Class 600 cast valves (BS 1873) cover larger sizes (NPS 2–10) with flanged or butt weld ends. Class 800 has a higher pressure rating than Class 600 at ambient temperature (136 bar vs 102 bar) but covers a smaller size range.
Socket weld or threaded — which should I specify?
Socket weld provides a stronger, more leak-resistant joint and is preferred for high-pressure, high-temperature, and hazardous service. Threaded (NPT) connections are used where welding is not practical, for instrument connections, and for temporary installations. Most process piping specifications require socket weld.
What sizes are available?
NPS ¼, ⅜, ½, ¾, 1, 1½, and 2. Weights range from 1.5 kg (NPS ¼) to 10.5 kg (NPS 2). These are compact, lightweight valves designed for small-bore piping runs.
Can I get flanged ends on a Class 800 valve?
Flanged ends to Class 150/300/600 are available as a variant on request. Contact us with your requirements. Standard supply is socket weld or threaded NPT.

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